13. The waiter and the waitress play table tennis every day.( 改为否定句)

12. The girl dances beautifully.(改为感叹句)

11. I will make model planes with my classmates on Sunday. (对画线部分提问)

10. Does she like growing flowers? (给予否定回答)

9. I am ill. (对画线部分提问)

8. She is buying some food in the supermarket.(改为否定句)

7. I have a desk and a chair.(用He做主语改写句子)

6. I am writing now.(同上)

5. I can speak English.(改为一般疑问句)

4. There are twelve studens over there.(同上)